Universal format, best for photos. No transparency.
Finds the best quality that fits the budget — downscales only if nothing fits.
Compression runs entirely in your browser — your image never leaves your device.
Compress Image to 300KB
A 300KB cap is the gentle end of upload limits — email attachment thresholds, blog and CMS media settings, plenty of application forms. Most images fit it without any downscaling at all: the compressor searches quality levels until it finds the highest one under 300KB, so you get a file that looks untouched and simply obeys the limit.
At this budget the usual outcome is full resolution with a modest quality reduction — typically indistinguishable from the original on screen. Only unusually large or detailed sources (high-megapixel camera files) trigger a resolution step-down, and the result panel tells you when that happened.
JPG is pre-selected because it is the format these destinations almost always expect; switch to WebP in the sidebar when the destination supports it and keep more quality per kilobyte.
Email systems and legacy mail gateways, blog and forum uploads, job-application portals and CMS thumbnails are the usual suspects. The cap is generous enough that most web-ready images already fit — this page is for the ones that don't.
Usually not — at 300KB most web-sized images fit at full resolution. Only very large camera originals may be stepped down, and the result panel reports the delivered dimensions when that happens.
Typically little to none visibly — the tool picks the highest quality under the cap, which for most images lands well above the level where artifacts show.
JPG is pre-selected for maximum acceptance. If the destination handles WebP, switching keeps visibly more quality inside the same 300KB.
No. Everything runs inside your browser tab — no upload step, no server storage, no queue.